In the following exercises, you will use the data in the Alexamara Marina Group database...

In the following exercises, you will use the data in the Alexamara Marina Group database shown in Figures 1-20 through 1-24. (If you use a computer to complete these exercises, use a copy of the original Alexamara database so your data will not reflect the changes you made in Chapter 3.) If you have access to a DBMS, use the DBMS to perform the tasks and explain the steps you used in the process. If not, explain how you would use SQL to obtain the desired results. Check with your instructor if you are not certain about which approach to take.

Assume the Owner table contains a column called TotalRental that represents the total rental fee for all slips rented by that owner. Write the code for the following triggers following the style shown in the text.

a. When inserting a row in the MarinaSlip table, add the rental fee to the total rental for the appropriate owner.

b. When updating a row in the MarinaSlip table, add the difference between the new rental fee and the old rental fee to the total rental for the appropriate owner.

c. When deleting a row in the MarinaSlip table, subtract the rental fee from the total rental for the appropriate owner.

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